StubCallInterfaceDescriptor takes a context register.

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index 3d7f72b9e22c4c1252f2d6be72908b8250231669..bcda543c6cd5caff72c32b256a92fcc8f0b2544a 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -1854,8 +1854,8 @@ class LCallWithDescriptor V8_FINAL : public LTemplateResultInstruction<1> {
                       const ZoneList<LOperand*>& operands,
                       Zone* zone)
     : descriptor_(descriptor),
-      inputs_(descriptor->environment_length() + 1, zone) {
-    ASSERT(descriptor->environment_length() + 1 == operands.length());
+      inputs_(descriptor->GetEnvironmentLength() + 1, zone) {
+    ASSERT(descriptor->GetEnvironmentLength() + 1 == operands.length());
     inputs_.AddAll(operands, zone);
   }